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Dodge Dakota Catalytic Converters

Like with any other vehicle, your Dodge Dakota’s catalytic converter can fail or get clogged. Luckily, you can get a new catalytic converter for your truck right here at CarParts.com. Our wide selection of parts comes from trusted manufacturers, so you can be sure about their quality and durability. Take a look at our products below and get the best deal when you shop for a Dodge Dakota catalytic converter now!
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Direct Replacement Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: REPD960307
Vehicle Info Required to Guarantee Fit
$211.99
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 19.5 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/501-430Gasket Included : Without GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 20389Series : Direct Replacement SeriesTube Material : Aluminized Steel
99205HM Heavy Metal Series Semi-Universal (Welding Required) Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: M6699205HM
Vehicle Info Required to Guarantee Fit
$178.00
Product Details
Location : Front Or Rear, Driver Or Passenger Side, Rear, Front, Driver Side Or Rear, Passenger Side, Rear, Passenger Side, Front, Driver Or Passenger Side, Driver Side, Rear, Driver Or Passenger Side, Front, Driver Or Passenger Side, Front Or Rear, Front, Driver Side Or Rear, Driver Or Passenger Side, Front, Passenger Side, Passenger SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 2.25 in. Inlet/Outlet; 13 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : Lifetime Magnaflow Limited WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : Magnaflow Catalytic Converter SaleSeries : Heavy Metal SeriesTube Material : Stainless Steel
99006HM No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Part Number: M6699006HM
Vehicle Info Required to Guarantee Fit
$222.00
Product Details
Location : Rear, Driver Or Passenger Side, Rear, Frontward Or Rearward, RearEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 16 in. in length with 2.5 in. inlet and outlet diameter; 16 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : Magnaflow 5 year / 50,000 Mile Limited WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : Magnaflow Catalytic Converter SaleSeries : HM Grade SeriesTube Material : Stainless Steel
51206 No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Part Number: M6651206
Vehicle Info Required to Guarantee Fit
$194.00
Product Details
Location : Center Or Rear Rearward, Front Or Rear, Driver Or Passenger Side, Front Or Rear, Passenger Side, Front, Passenger Side Or Rear, Driver Or Passenger Side, Rear, Rear, Passenger Side, Front, Driver Or Passenger Side, Rear, Rearward, Rear, Driver Or Passenger Side, Center, Rear, Driver Or Passenger Side, Front, Driver Or Passenger Side, Front Or Rear, Front, Passenger Side, Passenger Side, Front Or Rear, Driver Side, Rear, Driver SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 13.75 in. L x 5 in. W x 4.75 in. HRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : Magnaflow 5 year / 50,000 Mile Limited WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : Magnaflow Catalytic Converter SaleSeries : OEM Grade SeriesTube Material : Stainless Steel
83401 No Returns Accepted - Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal, Semi-Universal (Welding Required)
Part Number: WK83401
Vehicle Info Required to Guarantee Fit
$264.99
Product Details
Location : Front Or Rear, Driver Or Passenger Side, Front, Driver Or Passenger Side, Front Or Rear, Rear, Driver Or Passenger SideEmissions : CARB and Federal EPA Standards, 50-state LegalNotes : (1) Inlet Quantity; (1) Outlet Quantity; 2 in. Inlet Diameter A; 2 in. Outlet Diameter A; 4 in. Converter Body Height; 4 in. Width; 8 in. Body Length; Stainless Steel Body Material; Ceramic Substrate Material; Round Body Shape; Pipe Inlet and Outlet Connection Type; 12 in. overall lengthType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-182-69Gasket Included : Without GasketWarranty : 5-year or 50,000-mile Walker limited warrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : CalCat SeriesTube Material : Stainless Steel
KIT-090523-117 Front Catalytic Converter Kit, Four Wheel Drive, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), includes Oxygen Sensor
Part Number: KIT-090523-117
Vehicle Info Required to Guarantee Fit
$225.99
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Restricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : KitGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : Catalytic Converter 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and welds; Oxygen Sensor 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 25024947Tube Material : Aluminized Steel
KIT-090523-129 Front Catalytic Converter Kit, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Direct Fit, includes Oxygen Sensor
Part Number: KIT-090523-129
Vehicle Info Required to Guarantee Fit
$221.49
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Restricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : KitGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : Catalytic Converter 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and welds; Oxygen Sensor 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 25024249Tube Material : Aluminized Steel
19497 Center Exact Fit Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV19497
Vehicle Info Required to Guarantee Fit
$405.49
Product Details
Location : CenterEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 24 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Exact Fit SeriesTube Material : Aluminized Steel
19217 Front Standard Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV19217
Vehicle Info Required to Guarantee Fit
$303.99
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 20 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : REPD960307Series : Standard SeriesTube Material : Aluminized Steel
19091 Front Exact Fit Series Direct Fit Catalytic Converter, RWD Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV19091
Vehicle Info Required to Guarantee Fit
$566.99
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 64 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 20388, 9226Series : Exact Fit SeriesTube Material : Aluminized Steel
190911 Front, Driver Side Exact Fit Series Direct Fit Catalytic Converter, RWD Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV190911
Vehicle Info Required to Guarantee Fit
$182.49
Product Details
Location : Front, Driver SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Illegal for installation in NY on vehicles equipped with California emission systems. This part is available split and must be welded or clamped together, order left and right assemblyRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Exact Fit SeriesTube Material : Aluminized Steel
191892 Rear Exact Fit Series Direct Fit Catalytic Converter, 4WD Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV191892
Vehicle Info Required to Guarantee Fit
$135.49
Product Details
Location : RearEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 35 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Exact Fit SeriesTube Material : Aluminized Steel
14527 Standard Cab Pickup Center Exact Fit Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV14527
Vehicle Info Required to Guarantee Fit
$178.49
Product Details
Location : CenterEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Without air tube port provision; 55 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Exact Fit SeriesTube Material : Aluminized Steel
14541 Center Standard Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV14541
Vehicle Info Required to Guarantee Fit
$189.49
Product Details
Location : CenterEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 60 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Standard SeriesTube Material : Aluminized Steel
14522 Center Standard Series Direct Fit Catalytic Converter, RWD Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV14522
Vehicle Info Required to Guarantee Fit
$213.49
Product Details
Location : CenterEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 59.25 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Standard SeriesTube Material : Aluminized Steel
Page 1 of 15 | Showing 1 - 15 of 215 results

Customer Guides

Useful Tips to Keep Your Dodge Dakota Catalytic Converter from Suffering Premature Damage

Your Dodge Dakota catalytic converter is considered as the most important anti-pollution device that's on your car. It's responsible for keeping your emissions free from noxious chemicals. Catcon-related problems rarely occur, and that's a good thing since replacing this part can be really expensive. Keeping your catalytic converter in good shape also ensures superb engine performance. Bear in mind that preventive maintenance is the key to a lasting catcon. Here are some tips to help you out:

  • Know the best time to change your truck's oil.

Did you know that the integrity of your catcon depends in the quality of your truck's oil? Neglecting to perform the routine oil change makes it more volatile and causes leaks to occur on different components of your vehicle, increasing the risk of damaging the catalytic converter. So if you want to prevent catcon-related problems, don't go past the manufacturer-recommended schedule before you get your oil changed. This procedure is usually done every time your truck reaches 5,000 miles. You should also consider the driving conditions you constantly take your vehicle in as well as the total time that you've actually driven it.

  • Keep an eye out for leaks.

Another good way to keep your catalytic converter in its best condition is to ensure that all components associated with it are free from leaks. The most common parts of your vehicle that usually spring a leak include the exhaust system, intake-manifold gasket, and fuel injector. Always remember to check these components on a regular basis. Keeping these parts free from leakage helps you avoid possible catalytic converter contamination. Make sure you repair leaks if you found any.

  • Replace broken components as soon as possible.

There are many other parts of the vehicle that affects the performance of your catcon, this is why maintaining the catalytic converter also means that you have to properly care for your truck's entire system. Pay close attention to the components of your fuel and exhaust systems. Look for irreparably damaged parts and make sure you replace them to uphold the integrity of you catcon.

  • Drive more carefully.

Your Dodge Dakota catalytic converter is not indestructible; it's quite prone to getting hit and dented. Keep this in mind when you take your truck out for a ride. It would be best to avoid ruts and speed bumps or at least slow down when going over them.

Reducing the toxic emissions of your vehicle may be the key role of your Dodge Dakota catalytic converter, but did you know that it's also very important for your truck's fuel efficiency and performance? With its significant functions, ensuring that it's in excellent condition is a must. Identify problems as soon as they arise to prevent it from rendering your truck unusable. Here are some of the ways to tell if your catalytic converter has reached the end of its service life:

Disturbing rattles

It's not normal for your catalytic converter to make any type of racket, much less a noisy clacking or rattling one. So, if you're hearing these sounds coming from your catcon, you better jack your truck up and start checking its condition. The clacking or rattling noises generally come from a broken ceramic honeycomb that's found inside the catcon. This usually happens when the catcon is subjected to extreme temperatures or physical impact. To diagnose this problem, you need to shake your catalytic converter a little or hammer it gently with a rubber mallet. Keep your ears up for any rattling noises inside. If you confirm that a component inside the catalytic converter is indeed causing this noise, take it to a mechanic to figure out the best solution for your problem. Ready your wallet; you probably need to replace the whole thing.

Foul stench

Foul odors coming out of your exhaust is another infamous sign of a failing catalytic converter. If the air around your truck is recently reeking with smells of rotten eggs or sulfur, check your catcon immediately. You can think of this foul smell as an indication that your catcon is running on an incorrect air-to-fuel ratio, which is usually brought about by a damaged oxygen sensor. It will only be a matter of time before it totally melts down so it's important that you get it checked the moment you start smelling foul odors from your vehicle.

Poor engine performance and fuel economy

Keep in mind that a damaged catcon may cause your engine to malfunction. Monitor how your vehicle behaves whenever you try to accelerate or go up steep slopes. You should also watch your fuel mileage carefully. Engine hesitation and low fuel mileage are two symptoms of a catcon that's gone bad. Again, take it to a certified mechanic to figure out the best solution to your problem.

How does a catalytic converter become legal?

The 'legality' of a Dodge Dakota catalytic converter is determined by the part's ability to lessen the toxicity level of the byproducts emitted by the vehicle. If the catalytic converter is perfectly capable of converting harmful chemicals and preventing such from being released into the air during combustion, then it will be recognized as legal in all states.

 

How to spot a defective Dodge Dakota catalytic converter?

There are two most common signs that the catalytic converter is defective or not working properly. One, if there is a noticeable drop on the engine power. This could be very obvious, so once it feels that there is something wrong with the engine, the converter should be checked immediately. It may also be characterized by a difficulty in gaining speed or acceleration no matter how hard you step on the gas pedal.

 

Is the Dodge Dakota catalytic converter legal in all states?

Yes. The Dodge Dakota catalytic converter is 50-state legal. This means that Dakota owners will no longer have to worry about going interstate due to the fear brought by their catalytic converters. The one installed on a Dakota is legally recognized by the whole country.

 

What could cause a Dodge Dakota catalytic converter problem?

A lot of factors may cause the catalytic converter to fail or not function well. The converter may be clogged or it could also be that it is poisoned. The exhaust valves on the engine may also be damaged or is overheated due to a problem on the plugs. If any of these is present on the Dodge Dakota's combustion system, then the converter should be up for repair or replacement.

 

Will the Dodge Dakota catalytic converter affect the truck's speed?

No. A Dodge Dakota catalytic converter in perfect condition definitely has no effect on the speed of the vehicle. The only time that it may cause problems with regards to speed is when the converter is damaged.

Helpful Automotive Resources

P0430 Code: Catalyst System Efficiency Below Threshold  (Bank 2)
P0430 Code: Catalyst System Efficiency Below Threshold (Bank 2)A failing catalytic converter breaks down less pollutants in the exhaust, resulting in lower oxygen (O2) levels overall. The downstream oxygen sensor detects the change and informs the vehicle’s computer. In turn, the computer activates the check engine light and logs the appropriate OBD-II trouble code for diagnosis by a
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3When there are only 3 O2 sensors it’s typically because there’s only one catalyst being monitored, and “Bank 1” is the default designation when there’s only one sensor in a category. Diagram showing 3 oxygen sensors | Image Source: Richard McCuistian
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)To learn why O2 sensors need to be heated, you may read our explanation here.